A Perceptual Flexibility Battery

In the course of a continuing, long-term research project on "Perceptual Changes and Psychopathology" being conducted at the East Orange Veterans Administration Hospital (Ittelson, 1955), a Perceptual Flexibility Battery has been developed. It consists of three of the Arnes demonstrations in perception (Ittelson, 1952 ) : The Leaf Room, The Thereness-thatness Table, and the Rotating Trapezoid. The apparatus is described in detail and illustrated by Ittelson (1952). In this brief report, an introductory account of the apparatus and test administration procedures will be followed by a description of the scoring method, with tentative interpretative suggestions of their meanings. Reliability data and intercorrelations between scores will then be reported and discussed.